Choropleth Map: SG Postal Sector
Above is a postal sector map of Singapore. It was a created to test out the postal sector shape map I created using QGIS (Shape file) and it used Leaflet Framework to general the interactive map visual.
Why create postal sector shape map from scratch?
Many business (such as Logistics and Postal) uses postal sector (First two digits of SG postal code) for planning. However, there is no official postal shape map released by authorities. Maps on Data.gov.sg or sla.gov.sg are either in by town or by postal district (commonly used in property industry).
How to use?
Very simple. We create a color scale to indicate a certain unit range. Depending on the use cases, this could be a representation of deliver volumes, sales transactions, or people count, etc… Darker color means higher values and lighter means smaller values.
Then visualized the map and fill up the sectors matching the scale. For this example, the scale is a representation of number of postal code in each sector for illustration purpose. In real uses, it could be delivery count or transactions.
Based on the map, we can quickly identify which are the high or low volumes sectors and adjust our resource(s) or asset(s) deployment to the area.
Above are some zooms in views. Example, we can overlay the road traffic conditions on the map. It is also possible to add layer say stores locations.
Last, I would mention that the postal code data(2018) used in this visual was taken Kaggle. If you are interested, here’s the link.
Thanks for reading. As this post is more to record the idea and my learning journey, I shall end it here.
